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Subject: Re: [PATCH 0/4] Virtual Machine Time Accounting
From: Rusty Russell <rusty@rustcorp.com.au>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Laurent Vivier <Laurent.Vivier@bull.net>,
       kvm-devel <kvm-devel@lists.sourceforge.net>,
       Ingo Molnar <mingo@elte.hu>, John Stoffel <john@stoffel.org>,
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Date: Tue, 21 Aug 2007 09:30:56 +1000
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On Mon, 2007-08-20 at 09:13 -0700, Jeremy Fitzhardinge wrote:
> Laurent Vivier wrote:
> > functionnalities:
> >
> > - allow to measure time spent by a CPU in a virtual CPU.
> > - allow to display in /proc/state this value by CPU
> > - allow to display in /proc/<pid>/state this value by process
> > - allow KVM to use these 3 previous functionnalities
> >   
> 
> So, currently time spent in a kvm guest is accumulated as qemu-kvm
> usertime, right?  Given that qemu knows when its running in qemu vs
> guest context, couldn't it provide the breakdown between user and guest
> time (ditto lguest)?

No, unfortunately it's accumulated as system time.

Rusty.


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